Lighting equipment



Aug. 1s, 1942,

A. L. ARENBERG LIGHTING EQUIPMENT i Fiiqd sept. 16, 19:57

l :s sheets-sheet 1 fw/p Aug. 18, 1942.

A. L.`ARENBERG LIGHTING EQUIPMENT Filed sept. 16, 1937 5' Sheets-Sheet 2 Patented Aug. 18, 1942 LIGHTING EQUIPMENT Albert Arenberg, Highland Park, Ill., assigner to Patent License Corporation, Chicago, Ill., a I corporation of Illinois Application September 16, 1937, Serial'No. 164,228

(Cl. 24M-7.35)

Z Claims.

This invention has to do with lighting fixtures of the type in which a globe is fitted to a holder` mounted in the ceiling of a railwaycar, bus or other place to be illuminated, and is particularly concerned with the way in which the holder for the globe is fastened in place in the ceiling.

The principal object of the invention is to provide, in a lighting. fixture of the type described, a simple, inexpensively constructed and easily installed globe holder assembly which can be mounted securely in an aperture in the ceiling `without having its appearance marred -by any exposed screws or other attaching means.

Another object of the invention is to provide, in a lighting fixture of the type described, novel means in association with the globe holder for effecting a controlled distribution of the light rays through different sections of the globe.

While the-foregoing statements are indicative Y in a general way of the nature of the invention.,

several modifications thereof are presented herein for the purpose of exemplification, but it will of course be appreciated that the invention is susceptible of embodiment in still other structurally modified forms coming equally within the scope of the appended c' rims.

In the accompanying drawings: I Fig. 1 is a vertical transverse section throug a railway car or bus, showing substantially the distribution of light which can be obtained with the present invention;

Fig. 2 is a vertical transverse section through the ceiling of the car at the location of one of the fixtures;

Fig. 3 is a face view of the fixture, looking up, with the globe removed;

Fig. 4 is a sectional view which corresponds to Fig. 2 but shows a modied form of holder and globe;

Fig. 5 is' a partially sectioned side view which shows a modification in the circular holder supporting bracket;

Fig. 6 is a plan view of the bracket shown in Fig. 5:

Figs. 'l' and 8 are side and plan views, respectively, of a modification in the holder supporting means;

-fixtures mounted -in the ceiling in accordance with Figs. 9 and 10 are corresponding views of another modification;

Figs. l1 and 12 are corresponding views of another modification; and

Figs. 13 and 14 are corresponding views of still another modification. Y

Lighting fixtures constructed in accordance with the invention are preferably, though not necessarily, employed to illuminate car interiors in the manner shown in Fig. 1, wherein two rows I0 of fixtures are arranged along the ceiling II of the car at opposite sides of the center aisle I2, so as to provide high intensity light over the seats I3 and soft diffused light in the aisle and against the ceiling and side walls, all substantially in accordance -with the disclosure in Arenberg f Patent No. 2,020,273.

The fixture illustrated in Figs. 2 and 3 is composed of a sheet metal holder Il, a 'socket I5 for a lamp bulb I6, a globe I'l and a bracket I8. The holder I4 is a centrally apertured hat-shaped stamping which is characterized by a threaded tubular portion I9, an outturned bottom flange 20 and an inturned top 2l. The tubular portin I9 of the holder is adapted to be inserted in an aperture 22 in the ceiling, with the bottom flange 20 of the holder positioned snuglyl against the ceiling about the edge of the aperture.

'I'he bracket I8 is a centrally apertured hat-- shaped stamping which is characterized by a tubular portion 23, an outturned bottom flange 24 and an inturned top flange 25. The bracket I 8 is adapted to be installed over the aperture 22 in the ceiling, with the outturned bottom flange 24 secured against the ceiling in opposing relation to the bottom flange 20 of the holder-and with the inturned top flange 25 overlying the outer portion of the top 2| of the holder in such manner as to form a 'support to which the latter is releasclear the roof 33 and yet position the bulb I6 with the center of the same exactly in the center of the holder.

The globe I1 is made of glass, in one piece, and and is characterized by a clear lens portion 34 in the bottom thereof and a light-diffusing portion 35 about the lens portion. The globe I1 is provided, above the light-diftuslng portion l5, with an exteriorly threaded cylindrical rim 36. The globe I1 is secured to they holder I4 by having the rim 36 screwed into the threaded tubular portion I9 of the holder, in which position it is held against loosening by leaf springs 31 which are secured to the top 2| or the holder by screws 38 and press downwardly against the upper edge of the rim 36 of the globe.

With this improved construction a lighting xture of the type under consideration can be easily and securely applied to a ceiling, without any need of finishing oit the edge oi.' the aperture in the ceiling or observing a particularly close ilt, and without any fastening means being visible from below after the globe has been screwed into the holder.

The iixture shown in Fig. 4 is mounted in the ceiling in exactly the same way as the ilxture shown in Figs. 2 and 3. The holder I4 and bracket I8 are also the same, but in this embodiment the holder I4 is used to support an additional member, namely, a special light reecting and distributing shield 39 for coaction with aspecial globe 40. The globe 40 is cylindrical and has a concave bottom 4|. 'I'he sides and bottom of the globe are enameled or otherwise treated to render them light diiIusing. The shield 39 is secured at its top to the top 2l of the holder, about the bulb IB, and is characterized by a perforated cylindrical portion 42 adjacent the bulb and an `imperforatedownwardly and outwardly flared reilector portion 43 below the perforated portion, which flared portion 43 terminates downwardly in a rim 44 which is of substantially the same diameter as the inside of the concave bottom 4'I of the globe. This novel shielding arrangement results in the sides of the globe being softly illuminated in an indirect manner through the perforationsin the upper portion of the shield and the concave bottom of the globe being much more brightly illuminated directly from the bulb and from the refleeting surfaces of the shield.

Various modifications of the bracket I8 are shown in Figs. to 14 inclusive oi' the drawings. In Figs. 5 and 6` the bracket Il is shown provided with a closed top 45, with the socket 46 for the lamp bulb arranged in a vertical position within such top; in Figs. 7 and 8 the bracketing means is shown as a wide sheet metal bridging strip 41 which is open at opposite sides; in Figs. 9 and 10 the bracketing means is shown as two narrow parallel strips 48 and 49 which extend over the holder at opposite sides of the socket;

in Figs. 11 and l2 the bracketing means is shown y the edge oi the aperture; and a bracket for the holder for installation across the aperture in the ceiling, which bracket is characterized by an outwardly turned foot portion adapted to bear against the ceiling in opposing relation to the rim portion of the holder, an upstanding web portion, and an inturned top portion to which an underlying part of the cover portion of the holder is adapted to be releasably secured.

2. In a lighting iixture i'or railway cars, buses and the like, a hat-shaped holder for insertion in an aperture in the ceiling, which holder is characterized by a threaded tubular portion adapted to receive a threaded globe, an upper cover portion adapted to receive a lamp bulb socket, and a lower outwardly turned rim portion adapted to fit up against the ceiling about the edge oi' the aperture; and a hat-shaped bracket for the holder for installation over the aperture in the ceiling, which bracket is characterized by an outwardly vturned rim portion adapted to bear against the ceiling in opposing relation to the rim portion of the holder. an upstanding tubular portion adapted to encompass the holder, and a top portion to which an underlying part of the holder is adapted to be releasably clamped.

ALBERT L. ARENBERG. 

